Mogens V. wrote:
I think it is aluminium dust rather that silver dust.
You may very well be right. Still is a good thermo coupler 
Aluminum is 40 times worse than diamond.
Difficult cutting them tiny flakes off a diamond for the heat
compound..
You will never make it in high end audio with that attitude, do you want
flakey sound? - if you want clean, transparent sound, then you cut them in
thin slices and use them like mica was used. Single ended designs may be
attractive for budget conscious ....
Kind regards
Peter Larsen